That specific areas of the brain are associated with specific cognitive processes
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5 centres in the brain?
Visual, Auditory, Motor, Somatosensory, Langauge
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Where is the primary visual centre?
In the visual cortex in the occipital lobe
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Process to brain?
1) Photoreceptors in retina detect changes in light 2) Sends nerve impulses along optic nerve 3) Most nerve impulses terminate in the thalamus 4) This relays info to visual cortex
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Right hemi cortex receives input from...
Left visual field
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Where is most of the auditory centre?
In the auditory cortex in the temporal lobe
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Process to brain?
1) Cochlea converts sound waves into nerve impulses 2) Impulses travel along auditory nerve 3) Arrive at brain stem (basic decoding) 4) Pass to thalamus for further processing 5) Arrives at auditory cortex (recognition)
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Where is the motor cortex located?
In the frontal lobe
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What does it generate?
Voluntary motor movements
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Where is the somatosensory cortex located?
Parietal lobe
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Info from?
Detects sensory events around the body
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What does it do with sensory info from skin?
Used to produce sensations of touch, pain, pressure etc
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2 language centres in the brain?
Broca and Wernicke
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What runs between the 2 centres?
Arcuate fasciculus
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Broca's area is responsible for speech
Production
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Location?
Posterior portion of frontal lobe, left hemi
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Wernicke's area is responsible for speech
Understanding
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Location?
Posterior portion of left frontal hemi
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Support for language centres?
Ppl with expressive aphasia (inability to produce) were found to have damage in Broca's
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Individual differences?
Women have proportionally larger Broca's and Wernicke's
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(-) Broca's?
MRI's have shown the other areas are responsible for production too - not localised
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What may be more important than localisation?
Communication - Wernicke himself said although different regions have different functions, they must interact to produce complex behaviours
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